Process of coupling pipes.



F. SARGENT. PROCESS OF COUPLING PIPES. APPLICATION FILED NOV. 3, 1910.

, 986,506, Patented Mar. 14, 1911.

I 8 1 1 i b Wilnesses IIIVEDIUI" Fredericfi 5211 51 W 31% Original application filed December 18, 1909;

v .UNITED 1 PATENT OFFICE.-.

\ rnnnni'uox sAa'GnN'r, or cin'cao'o, ILLINOIS, AssIeNois or ONE-HALF 'ro oLAr E.

oLEsoN, or CHICAGO, ILLINOIS.

r'nocnss or COUPLING r Ir'ns.

useful Improvement in Processes of Coupling Pipes, (Case 2,) of which the follow ing is a full, clear, concise, and exact description, reference panying drawings, specification.

My invention relates to forming a part of this rocesses of cow pling pipes and its object is to provide'for her 29, 1910, the

tight and durable oint.

cation .is divisionai from my filed December -18, 1909, Se- Iatent No. 977 ,226, Novemlatter application being now directed alone toward a pipe coupling as an article of manufacture.

In accordance with my invention the joint is sealed by welding the abuttingends of pipes to be joined together and is held secure by meansof an auxiliar arrangement in the way of a mechanical clamp. The difliculty heretofore has been that a welded joint was not sufficiently reliable, so far as securing rigid mechanical connection of the joined pipes was concerned, and could not be used at all where it was probable that the ipes would be subjected to more or less 'requent strains. So far as the continuity of the pi s or the tightness of the 'oint is concerne it has been quite generally conceded that a welded joint cannot be excelled, and the only bar to its'more frequent employment is the insecurity of the mechanical connection, as above pointed out.

My invention proposes the employment of mechanical means for the purposes of holding the ends of the pipe together and, in addition, the welding of the pipe ends to. secure an absolutely sealed joint. In a pipe an absolutel This appii copendin'g case,

rial No. 533,933,

. coupling constructed in accordance with my invention the necessity of gaskets, washers, or other similar packlng devices is entirely eliminated, while all, the advantageous featuresof such contrivances are retained. The

replacement of parts, so frequent when gaskets are employed, never becomes necessary, while, in taking down apipe system, no

'- difliculty in separating the pipes is encountered. 1

being had tothe accomspancamel Letters Patent. P tented Mar. 14, 1911.

Serial No. 533,933. Divided and this bar a, 1010.- Serial No. 590,508.

application filed Novem- The process of my invention will be better understood byreference to the accompany-' ingdrawings, in which- Figure 1 is a side elevational View of two pipe ends joined in accordance withmy invention; Fig. 2 is a cross-sectional view taken on the plane2, 2 of Fig. '1; and Fig.

3 is a view similar to Fig. 1 showing a modified arrangement.

the ends thereof, as shown at 5, 5, are flanged outwardly to present a considerable engaging surface and, further, to provide means with which a mechanical clamp can cooperate. The mechanical clamp comprises, as illustrated, a pair of clamping ri'n 6, 6 which engage respectively on opposite sides of the joined flanges, as clearly shown in Fig. 1.- The rings 6, 6 are providedwith registering openings 7 7 for the reception of bolts 8, 8, which are provided with clamping "nuts 9, 9, soth'at the two rings. can be drawn together to the desired extent.

In usual practice 1 are made of soft to'be joined, are flanged at their abutting ends in any desirable manner. The clamp the pipes shown in Fig.

' Theabutting pipes are shown at 1,4, and

steel and, When they are f ing rings are then applied and the bolts tightened to secure bringing the 'fianged ends together. A hot flame is placed around the joined ends to form a Weld at w, being applied specifically tothe edges so th at the welding area. will be a somewhat l mited one. A convenientfway in which this may 'be done will be presently described. It 11s to be noted that the entire mechanical strain is taken up by the clamp, while the welding does no more than to form a hermetlc seal.

parts which it is desired to affect.

In Fig. 3 one of the pipe members is In the matter of welding the pipe ends abutting ends to form a weld at w, precisely j desired and the specific manner of welding,

shown as a casting 10, which has one of the clamping members formed integrally thereon. The pipe 4 is of soft steel like the pipes shown in Fig. l, and the clamping member 6 is applied precisely as described above. The bolt 8 passes through the clamping member '6 and directly through the member 11 on the casting 10, and it is clear that tightening of the bolts will draw the flanged end 5 of the pipe 4 against the face of the casting 10, as clearly illustrated in the drawing. The flame is now placed around the as described above. It is contemplated that this modified form will be employed where one of the members is an elbow, coupling device or other similar device.

' When it is desired to separate the pipes the mechanical clamp may be removed and a cold-chisel placed in the V-shaped annular groove and given a sharp blow.

The method of my invention may be employed to secure a very eflicient pipe joint in a very simple manner. The mechanical clamp, being first applied, brings the abutting ends in proper juxtaposition for the purposes of welding and the further steps in the process may be carried out very conveniently. The weld which results is such' that the pipes can easily be separated when which I mention and which I consider very important is very effective in securing this desirable iorm of weld and in securing it in a very convenient manner.

I claim as new and desire to secure by Letters Patent:

1. The process of coupling pi es which consists in permanently mechanica ly clamping the abutting ends of the pipes together,

ing heat upon the edges of said ends to weld the edges to seal the joint.

4. The process of coupling pipes which consists in permanently mechanically clamping the abutting ends of the pipes together, and then welding the ends of the pipes together to seal the joint.

5. The process of coupling pi es which consists in permanently mechanica ly clamping the abutting ends of the pipes together, attaching one pole of an electric circuit to said pipes, and then drawing an arc bet-ween the other pole of said circuit and the ends of said pipes to form a weld to seal the joint.

6. The process of coupling pipes which consists in fianging the abutting ends thereof, then permanently mechanically clamping said ends together, then attaching one pole of an electric circuit to said pipes, and then drawing an are between the other pole of the electric circuit and the edges of said ends to form a weld to seal the joint.

In witness whereof, I hereunto subscribe my name this 31st day of October, A. D.

FREDERICK SARGENT. Witnesses ARTHUR H. Bon'rronnn, ALBERT G. MCCALEB. 

